Adjusting mechanism for motion-picture-film framing means



May 13, 1930. J. F. ADAMS 1,758,639

ADJUSTING MECHANISM FOR MOTION PICTURE FILM FRAMING MEANS Filed May 22, 1928 INVENTOR U Jhnf'ran cis flaams Patented May 13, 1930 UNITED. STATES JOHN FRANCIS ADAMS,

PATENT OFFICE OF PHJELADELPHIA, PENNSYLVANIA Application filed May 22, 1928. Serial No. 279,638. I

This invention relates to motion picture machines and has particular reference to micrometer means for adjusting the tramine-ch-aniszn on motion picture projecting macnines The i nning mechanism for the conventional motion picture machine is operated by hand which has a lever action and which elevated or lowered and is quite diilicult accurately n'ianipulate by hand in order frat. e the picture with any degree of precrown.

The ohjec' of this invention is to provide means for iositirely and accurately adjusting" the framing mechanism.

Another object is to provide means for precisely adjusting the training mechanism in a facile manner.

Another ohject to prevent creeping due to the iooseness of the framing mechanism or vibrations oi the mechanisms Another to provide means for operating the tanning mechanism which will he always loca i in the some 'j'BOFitlGll and will he more accessihle and within eat reach of the operator.

Another ol'iject to provide means for operating the framii'ne mechanism which will provide smooth action and theretore he less likely to break the tihn' which. in the usual lfifiillitlfts is often injured h an abrupt operation of the fin nine hamlle.

Another object is to 'iroride int-aim as shore orth, which is simple courts tion and. W! h man be econon'iicali mannapplied to stainlard motion pic ing machines.

to the invention, the framing r-i nieenarnszn at the ordinary motion picture machine provided with lever having means for attaching it to a rack, a pinion 'th said inch, and means tr ro ts-ting the pi ion.

The tirar grs' illustrate an the invention and the o lows 3 igure 1 a perspective view of a port-ion P. the motion picture machine to which the invention is applied.

li 'gnre f; is a fragmentary View of the hodiinent of .121 are lower reel box looking. in the directior i of the arrow A in Figure 1. and showing the operating shaft in section: and this View; shows the manner of mounting the mechal'ism of the invention on the reel box,

Figure 3 is a fragmentary sectional View taken on the line 3-3 otFigure 2.

In Figure l, a portion of a standard machine has been shown for the purpose of illustratingthe invention and includes a portion of the upper reel box (3, a portion of the lower reel box I. and the intermediate head 8. The

head carries the usual film feeding mechanism, which is ordinarily driven by a motor (not shown) ,and the figure shows the mechanism in position for receiving the tilin. The film is fed from the upper reel box through the slide 9 and over the aperture 11 and is enclosed. by the aperture plate 12 which is swung on the hinge 13 after the film has been threaded through the teedniechzv nism. The film is passed downward through the rollers ll into the lower reel box 7 for collection.

The framing mechanism 16 frames the film, that is to say, positions the frames of the film over the aperture 11 and, for the adjustment of this mechanism. there is a socket l? which in the ordinary machine is provided with, a handle (not shown) but which. for the purpose of this invention is dispensed with a nd the long rod 18 substituted there for.

The lower reel box is provided with a tool tray at the rear thereof and this tray is held thereon by means of screws 21 and for the purpose of this invention the rear screws are withdrawn and longer screws 22'substituled therefor in order to hold the bearing bracket 23 on said tray.

The bearing bracket has a standard 24 at each end thereof in which an operating shaft 2%; is adapted to rotate. The shaft is provided with a collar 2? which is secured thereto and this collar is positioned adjacent the inner face of the left hand standard 24 while a pinion 28 is mounted on said shaft adjacent e outer face of said standard and is fixedly ceured thereto or the set screw 29 in the huh hereof. The collar :27 and pinion. 28 prevent :aicrel movement of the shaft 26.

Each end of the shaft is provided with a knurled or serrated. operating or hand wheel I 81 for rotating the shaft 26 and pinion 28.

The outer end of the rod 18 has a connecting block 32 secured thereon by a set screw 33. An arcuate rack 34 is pivotally secured at its upper end to said block by the screw 36.

This rack 34 extends downward along the outer face of the left hand standard 2; and meshes with the pinion 28 and it is held from lateral movement by the head of the screw 37 extending out from the outer face of sai standard.

The framing of the film in the ordinary practice and when the handle is used for elevating and lowerinig the framing device 16, is very ditlicult, and in order to adjust the same with any degree of precision, it is usually necessary to gently tap the handle in 20 order to get any nicety of adjustment.

\Vitli the micrometer mechanism of this invention the operating handles or hand wheels 31 can be rotated to provide precise adjustment without difficulty The invention provides Vernier mechanism of simple construction combined with accuracy of adjustment.

Of course, the adjusting means illustrated may be modified and changed in various Ways and the means for mounting the same may he changed according to the particular type of machine to which the same is applied Without departing from the invention as herein set forth and hereafter claimed.

I claim 2- Adjusting mechanism for motion picture film framing means comprising a rearwardiy extending lever for raising and lowering the framing means to adjust the film with respect to the aperture, a block secured to ihe outer end of said lever, an arcuate rack pivotally connected by its upper end to toe said block, a shaft having a pinion fixed therv on and meshing with said rack, a bracket having a pair of bearings for said shaft, screw means to said bracket for holding the rack and pinion in engagement, and means on said shaft for manually turning the same In testimony whereof I have signed my name to this sgjiecification.

N FRANCIS ADAMS. 

